Hydrocarbon and partially fluorinated sulfonated copolymer blends as functional membranes for proton exchange membrane fuel cells

被引:41
作者
Arnett, Natalie Y.
Harrison, William L.
Adami, Arland S. B.
Roy, Abhishek
Lane, Ozma
Cromer, Frank
Dong, Limin
McGrath, James E. [1 ]
机构
[1] Virginia Polytech Inst & State Univ, Dept Chem, Blacksburg, VA 24061 USA
[2] NanoSonic Inc, Blacksburg, VA 24060 USA
基金
美国国家科学基金会;
关键词
poly(arylene ether sulfone) (PAES); copolymer blends; radel (R); nafion (R); proton exchange membrane fuel cell (PEMFC);
D O I
10.1016/j.jpowsour.2007.04.051
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Polymer blending is recognized as a valuable technique used to modify and improve the mechanical, thermal, and surface properties of two different polymers or copolymers. This paper investigated the solution properties and membrane properties of a biphenol-based disulfonated poly (arylene ether sulfone) random copolymer (BPS-35) with hexafluoroisopropylidene bisphenol based sulfonated poly (arylene ether sulfone) copolymers (6FSH) and an unsulfonated biphenol-based poly (arylene ether sulfone)s. The development of blended membranes with desirable surface characteristics, reduced water swelling and similar proton conductivity is presented. Polymer blends were prepared both in the sodium salt and acid forms from dimethylacetamide (DMAc). Water uptake, specific conductivity, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and contact angles were used to characterize the blended films. Surface enrichment of the fluorinated component is illustrated by an significant increase in the water-surface contact angle was observed when 10 wt.% 6FBPA-00 (106 degrees) was added to BPS 35 (80 degrees). Water weight gain was reduced by a factor of 2. (C) 2007 Published by Elsevier B.V.
引用
收藏
页码:20 / 29
页数:10
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